Dynamical Analysis of Motorcycle by Using Multi-Body Dynamics Theory

2005 ◽  
Author(s):  
Zhu Shaopeng ◽  
Hidekazu Nishimura ◽  
Hirosi Tajima
Keyword(s):  
Dynamical Analysis ◽  
Body Dynamics ◽  
Multi Body

Dynamical Analysis for Mechanical Arm of the Coal Sampling Machine Based on Rigid-Flexible Coupling Model

2012 ◽  
Vol 605-607 ◽  
pp. 1172-1175
Author(s):  
Li Le He ◽  
Rong Li Li
Keyword(s):  
Lagrange Equation ◽  
Coupling Model ◽  
Dynamical Analysis ◽  
Dynamical Equations ◽  
Flexible Coupling ◽  
Body Dynamics ◽  
Coupling Mode ◽  
Flexible Deformation ◽  
Multi Body ◽  
Model Curve

Based on multi-body dynamics theory and the Lagrange equation， the rigid-flexible coupling dynamical equations of the Coal sampling arm was deduced.The rigid-flexible coupling mode is established by combining with Pro/E, ANSYS and ADAMS, and the model curve is gotten by simulation. The simulation results indicate that rigid-flexible coupling modeling is more actual and it is necessary to consider the flexible deformation of all arms when the sampling arm system is researched. The results in this paper presents the theoretical foundation for the sampling arm dynamical analysis and structure optimization.

A study on shape of electromagnetic guideway for continuous steel plates by analysis of multi-body dynamics

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1421-1429
Author(s):  
Yasuhiro Narawa ◽  
Sora Ishihara ◽  
Ryo Yamaguchi ◽  
Takahiko Bessho ◽  
Xiaojun Liu ◽  
...  
Keyword(s):  
Steel Plate ◽  
Steel Plates ◽  
Dynamical Analysis ◽  
Continuous Steel ◽  
Vibration Characteristic ◽  
Body Dynamics ◽  
Measurement Experiment ◽  
Noise Input ◽  
Multi Body ◽  
Solid Bodies

To obtain the static shape of the continuous steel plate and vibration characteristic, we performed the analysis of the multi-body dynamics in which the continuous steel plate was discretized in many solid bodies. The shape of the steel plate obtained by the measurement experiment was agreement with the static shape of the steel plate obtained by the analysis. Then, dynamical analysis was performed when white noise input to the steel plate. It was confirmed that the vibration could be suppressed when the electromagnets were installed in consideration of the static shape of the steel plate.

scholarly journals Estimating maximum bite performance in Tyrannosaurus rex using multi-body dynamics

2012 ◽  
Vol 8 (4) ◽  
pp. 660-664 ◽  
Author(s):  
K. T. Bates ◽  
P. L. Falkingham
Keyword(s):  
Body Size ◽  
Feeding Behaviour ◽  
Ontogenetic Change ◽  
Positive Allometry ◽  
Musculoskeletal Models ◽  
Terrestrial Animal ◽  
Body Dynamics ◽  
Mode Of Life ◽  
Scaling Analyses ◽  
Multi Body

Bite mechanics and feeding behaviour in Tyrannosaurus rex are controversial. Some contend that a modest bite mechanically limited T. rex to scavenging, while others argue that high bite forces facilitated a predatory mode of life. We use dynamic musculoskeletal models to simulate maximal biting in T. rex . Models predict that adult T. rex generated sustained bite forces of 35 000–57 000 N at a single posterior tooth, by far the highest bite forces estimated for any terrestrial animal. Scaling analyses suggest that adult T. rex had a strong bite for its body size, and that bite performance increased allometrically during ontogeny. Positive allometry in bite performance during growth may have facilitated an ontogenetic change in feeding behaviour in T. rex , associated with an expansion of prey range in adults to include the largest contemporaneous animals.

Sir Robert Stawell Ball and methodologies of modern screw theory

2002 ◽  
Vol 216 (1) ◽  
pp. 1-11 ◽  
Author(s):  
H Lipkin ◽  
J Duffy
Keyword(s):  
Computational Geometry ◽  
Rigid Body ◽  
Lie Algebra ◽  
Screw Theory ◽  
Mechanical Design ◽  
Ball Screw ◽  
Dual Numbers ◽  
Body Dynamics ◽  
Rigid Body Mechanics ◽  
Multi Body

The theory of screws was largely developed by Sir Robert Stawell Ball over 100 years ago to investigate general problems in rigid body mechanics. Nowadays, screw theory is applied in many different but related forms including dual numbers, Plilcker coordinates and Lie algebra. An overview of these methodologies is presented along with a perspective on Ball. Screw theory has re-emerged after a hiatus to become an important tool in robot mechanics, mechanical design, computational geometry and multi-body dynamics.

Tanker Truck Sloshing Simulation Using Bi-Directionally Coupled CFD and Multi-Body Dynamics Solvers

2014 ◽  
Author(s):  
Michael S. Barton ◽  
David Corson ◽  
John Quigley ◽  
Babak Emami ◽  
Tanuj Kush
Keyword(s):  
Body Dynamics ◽  
Tanker Truck ◽  
Multi Body

Study of Self-Propelled Pufferfish Driven by Multiple Fins: A Comparison Between Rigid and Deformable Fins

2017 ◽  
Author(s):  
Ruoxin Li ◽  
Qing Xiao ◽  
Lijun Li ◽  
Hao Liu
Keyword(s):  
Underlying Mechanism ◽  
Operating Conditions ◽  
The Self ◽  
Fish Swimming ◽  
Propulsion Efficiency ◽  
Live Fish ◽  
Body Dynamics ◽  
Computational Fluid Dynamics Cfd ◽  
Multi Body ◽  
Better Than

In this work, we numerically studied the steady swimming of a pufferfish driven by the undulating motion of its dorsal, anal and caudal fins. The simulations are based on experimentally measured kinematics. To model the self-propelled fish swimming, a Computational Fluid Dynamics (CFD) tool was coupled with a Multi-Body-Dynamics (MBD) technique. It is widely accepted that deformable/flexible or undulating fins are better than rigid fins in terms of propulsion efficiency. To elucidate the underlying mechanism, we established an undulating fins model based on the kinematics of live fish, and conducted a simulation under the same operating conditions as rigid fins. The results presented here agree with this view by showing that the contribution of undulating fins to propulsion efficiency is significantly larger than that of rigid fins.

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